Sheet-metal-working machine



0. 'P. NYSTROIVI.

SHEET METAL WORKING MACHINE.

APPLICATION FILED MAY 20, |918.

v Patented Mar. 2, 1920.

1332354 4 sHEETs-sHEETI z 33 E lm J 0 f I 0. P. NYSTROM. SHEETNIETALWORKING MACHINE. APPLICATION FILED MAY 20, 1918.`

Patented Mar. 2, 1920.

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SHEET'METAL WORKING MAcHlNE.

APPLICATlON FIL'ED MAYZO., 1918.

1,332,354. Patented Mar. 2, 1920.

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SHEET METAL WORKING MACHINE.

APPLLcATxoN FILED MAY2o,191e.

STATES PATENT OFFIC.

. OSCAR P. NYSTROM, OF HOLLAND, IJLICIIIGAN, ASSIGNOR TO" HOLLANDFURNACE COMPANY, OF HOLLAND, MICHIGANi A CORPORATION OF MICHIGAN.

SHEET-METAL-WORKEMG MACHINE.

Speccaton of LettersPatent.

Patented Mar. 2, 1920.

Application led May 20, 1918. Serial No. 235,613.

To all whom #may concern:

Be it known that I, OSCAR P. NYs'rRoi/r, a citizen ofthe United Statesof America, residing at Holland, in the county of 0ttawa and State ofMichigan, have invented certain new and useful Improvements inSheet-llietalWorking Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to. make and usethe same.

This: invention relates to a machine for working and forming sheetmetal, particularly various sections of metal which go to makeup anelbow or a similar construction in smoke pipes of furnaces or otherheating constructions', the invention being also adapted for makingelbows in various types of pipesv other than that mentioned,particularly the' hot air pipes leading from a furnace to various roomsin a; building heated by the same. It is a primary object and purpose ofthe present invention to provide; a machine with which variouscontinuous grooves and ridges may be formed at the ends of sections. sothat the, same may be fitted. and secured together to form an el-` bow,the invention consisting in many novel features; ofv construction andarrangement of' parts for eectively accomplishing the end desired.

For an understandingl of the invention and the mechanism embodying thesame, reference may be had to the accompanying drawings5 in which,

Figure L i's a side,` elevation, partly' in section, ofy a sheet` metalworking machine embodying my invention.

Fig. 2l is a plan View of the rotar f d1e carryingy member.

Fig. 3 is a vertical section therethrough andv adjacent: parts of arelatively stationary die member and' support cooperating with the diescarried by the. rotary member.

Fig. 4 is a side elevation of the Uconstruction shown in Fig. 2. l n

Fig. 5 is a fragmentary section, similar to that shown in Fig; 3, andillustrating a slight' modification in the dies.

Fig. 6 isV a horizontal sectiontaken substantially on the lined- 6 ofFig. l.l

Fig. 7 is a side elevatipn, partly 'in sec tion, of an elbow thesections of whichl are formedkon the machine.

- Fig. 8 is a plan View of the frame of the machine, the rotary die`member being removed.

Fig. 9i is a vertical section substantially on the line 9--9 of Fig. 8.

Fig. 10y is a front view of the upper portion of the frame of themachine, and

Fig. 11 is a fragmentary side elevation, partly vin section, of themechanism for bringing the various dies together in operative positionduring the operation of the machine.

Like reference characters refer tov like parts in the different viewsofthe drawings.l

Iny construction a relatively stationary table 1` is supported by aplurality of vertical supports 2, preferably, of tubular form, the samebeing connected andl braced between their upper and lower ends by across membery 3. The table l has a central opening through which a bossl projects in and through which a Vertical shaft 5 is mounted, beingslidable vertically throughthe boss but keyed thereto so that the bossrotates with the shaft. The lower end of the shaft extends a short.distance below the member 3 and has pivotal connection to a lever 6.which is pivotally mounted at 3? to and below the member 3. Its frontend extends in front of the forward supports 2 and isi formed with` afoot-engaging portion 7, while its rear end carries a weight 8', thenormal tendencyv of which is to elevate the shaft 5 to;4 upperyposition. The shaft: eX- tends through a vertical; spacing member 9connected to and extending above the mem ber 3, above which a pulley 10is connected with the sha-ft 5, the same being adapted to. be driven`byV an endless. belt 11 passing overy any suitable driving pulley 122onr a drive shaft 13. The belt is guided aroundv idle guide pulleys`llwhich are mounted on suitablev brackets l5 connected to they rearvvertical supports 2, it being; evident that the shaft 5 rotatescontinuously whenever the drive shaft 13 is in operation, the connectionof the lower end of the'shaft 5 tothe lever 6 bein,fr one suitabletopermit such rotation, as shown in Fig.

Above the table li at the rear portionthereof a die member 16` isfixed,` covering substantially the rear half of the table-1, in frontofwhich atzeach-f side edge ofl thetable i guides 17` are locatedbetween which a movable die member 18 is slidably mounted. Coil springs19 are interposed between the members 16 and 18, the tendency of whichis to force the member 18 toward the front and away from the rear member16. A head 20 having an inclined rear face 21 passes through an openingin the member 18,hav ing a coperating inclined face as shown in Fig. 9,the lower end of the head being connected to the upper end of a rod 22which at its lower end has pivotal connection to a lever 23 pivotallymounted between its ends on the member 3 as shown in Fig. 11. A link 24pivotally connects at its upper end to the rear end of lever 23, and atits lower end to the upper end of a second lever 25,

also pivotally mounted at a point between its ends'on the member 3,while a second link 26 connects the rear end of the lever 25 with thefoot-operated, lever 6. It is evident that upon depression of the frontend of the lever 6 by the foot of the operator of the machine, the diemember 18 is moved to the rear against the resistance of springs 19bringing the adjacent edges of the members 16 and 18 together. As soonas the pressure of the foot upon the front end of lever 6 is removed,springs 19 move the member 18 to its normal position, the head 20 beingelevated not only by the action of the weight 8,

but also by a coil spring 27 disposed under the front end of the lever23. This coil spring 27, however, is not absolutely essential and may beeliminated if desired.

A circular recess 28 is cut in the upper side of the table 1 and themembers 16 and 18 around this recess are cut away in semicircular formas shown. In the edges of the simicircular portions of the members 16and 18 dies are cut in the form of upper and lower grooves 29 as shownin Fig. 3. There may be one or more of these grooves, and in Fig. 5 Ihave shown a modification in which only one groove 29a is formed in themember 18a, similar to member 18, and of course the coperating member 16would likewise have one groove only.

A circular die-carrying member 30 seats in the recess 28 and isconnected to the boss 4 to rotate therewith. In diametrically opposedsides thereof recesses are cut, over which retaining plates 31, one ateach side of each recess, are secured to hold a sliding constructionunderneath, such construction comprising upper and lower connectedplates 32 and 33 between which at their outer ends circular dies 34 arerotatably mounted, the same being formed with ridges to coperate withthe grooves 29 in the die members 16 and 18. In the modification shownin Fig. 5 the die 34a has "one ridge only to coperate with the singlegroove 29,-

A rod 35 is attached to each of the sliding constructions, extendinginwardly therefrom and terminating in a head 36. A coil spring 37surrounds each rod 35 and is under compression, the tendency thereofbeing to draw the dies 34 away from the members 16 and 18 and force theheads 36 into grooves 38 cut in opposed sides of the shaft 5. It isevident, however, that on downward operation of the foot lever 6 and theconsequent movement of the shaft 5 in a downward direction, the upwardlyand outwardly inclined sides of the grooves 38 serve to force heads 36and attached rods 35 in an outward direction, thereby carrying the dies34 outwardly and into coperation with the grooves 29. The downwardmovement of the shaft 5 is limited by a collar 39 secured at the upperend of the shaft as shown.

In operation a section, such as 40, of plain sheet metal, for a pipeelbow is placed at one end between dies 34a and the cooperating groovemembers 16 and 18a, after which a depression of the foot lever 6 is madeforcing the dies 34a against the metal and causing it to enter thegrooves 29a, this making a single bead on the sections 40 as indicatedat 40a. Other sections such as that indicated at 41 are disposed in asimilar mechanism between the dies 34 andthe coperating groove members16 and 18 whereby, on depression of the f oot lever, a double beadindicated at 412L is made. The beaded ends of the sections 40 and 41 maythen be fitted together and by another? operation, which forms no partof the present invention, rmly secured together. It will be noted thaton depression of the foot lever, the member 18 is moved over toward thepart 16 and with the rotation of the diecarrying member 30, a smooth andcontinuous bead or double bead may be made on the section 40 or 41, andthat as soon as the foot lever 6 is released and member 18 permitted totake its normal position, the beaded section is free to be taken fromthe mechanism. In fact, with thin sheet metal there is no necessity touse a movable member 18, but the grooves 29 0r 29F-Vmay be cut in asolid member which may be made by connecting the parts 16 and 18together. But with heavier metals for heavier pipes, the movable diemember 18 is advisable if not absolutely essential. Each section 40 or41 is inserted between the die-carrying member and the grooved diemembers 16 and 18 and is left in momentarily while the foot lever isdepressed, the beads in the metal sections bei formed very rapidly,after which it is removed, permitting another section to be acted upon.Y

The construction described is very eiiicient for properly forming sheetmetal sections, which may later be connected together to make pipeelbows for furnace or smoke pipes, and with which, production may bevery greatly facilitated. In practical operation the mechanism hasproven completely satisfactory. The mechanism is relatively simple butis very efficient for attainment of the desired ends.

I claim:

l. In combination, a support, a die member mounted on and above thesupport and provided with a circular opening in the sides of which agrooved die is formed, a rotary die mem'ber located in the opening insaid first die member, a rotating die mounted to move radially on saidrotary die member, a vertical shaft on which the rotary die member issplined, said shaft having a groove formed with an upwardly andoutwardly inclined side, a headed pin connected with the radiallymovable die, said head entering the groove in the shaft, means tonormally hold said head in the groove, means to drive the shaft, andmeans t0y depress the shaft thereby forcing the radially movable dieoutwardly to coperate with the first mentioned die, substantially asdescribed.

2. In combination, a supporting frame, a vertically positioned shaftrotatably mounted on the frame, a lever pivotally mounted on the lowerportion of the frame to which the lower end of the shaft is conneeted,means tending to elevate the front end of the lever and to thereby raisethe shaft to upper position, a circular die carrying member splined onthe shaft, a roller die movably mounted on said member for radialmovements, means whereby on downward movement to the front end of thelever and consequent downward movement of the shaft, the roller die ismoved outwardly, a coperating die member surrounding the circular diecarrying member and formed with a die to coperate with the roller diewhen it is projected outwardly, and means to drive the shaft,substantially as described.

3. In combination, a circular member, a slide positioned radiallythereon, a roller die mounted at the end of the slide, means normallymoving the slide and die inwardly, means to rotate said member, a secondstationary member partially surrounding the circular member and providedwith a cooperating die at its edge adjacent the circular member, a thirdmember mounted to move toward or away from the other members, said thirdmember completing the surrounding of the circular member and also havinga coperating die formed at its adj acent edge, springs normally movingthe third member away from the other members, a. foot operated lever,means disposed between the lever and the third member for moving saidthird member toward the other members on operation of the lever, andmeans disposed between said lever and the slide to Project the slide androller die outwardly on operation of the lever, substantially asdescribed.

In testimony whereof I aifix my signature.

OSCAR P. NYSTROM.

